text | Technology Qiufeng
With the development of the times, basically every household has a router. But when we purchase, we often find that the routers on the market have at least two or three antennas, and the most may have seven or eight antennas. So, is it better if the router really has more antennas?
First of all, we should know that the coverage of wireless routers is determined by the 802.11 protocol, and the signal strength and wall-through capability we usually talk about are affected by the WiFi signal transmission power. Therefore, when we evaluate the quality of the router, we generally judge from the coverage, signal strength and wall penetration ability. determines the signal strength of the router lies in the transmission power. The greater the power, the stronger the signal (through the wall). But in fact, the country has already restricted this: the maximum is 100mW, which is 0.1W. Products that do not meet the requirements cannot be launched. So the signal strength of the router has been destined from the beginning, but it will be disturbed by various wall objects in the home.
At first, the router's single sending, receiving and transmitting mode was the mainstream, so the number of antennas in the early days was only 1. Mobile phones and routers transmit data at limited speeds over WiFi. When was 802.11n, that is, WiFi4, it introduced MIMO technology into the wireless router, allowing users to send and receive more data at the same time, thereby increasing the capacity of the transmission channel. The use of MIMO transmission technology requires support for multi-antenna. The router can divide the data into multiple copies, send it from different antennas, and integrate it on the receiver side to improve transmission efficiency. The purpose is to improve WiFi theory maximum network transmission rate . So in fact, the number of antennas and network speed are not much related to .
What's more, some routers don't even have external antennas, such as TP-Link's XDR6050.
As of now, more than four antennas are more to give higher transmission rates in the 2.4GHz and 5Ghz bands. With the development of the times, there are more and more smart devices in your home. 2.4GHz has longer transmission distances and better wall-through capabilities than 5GHz signals, while 5Ghz can provide faster network speeds, but often the signal will quickly fail after one wall. Moreover, since Bluetooth devices also use the 2.4GHz frequency band, a large number of devices synchronously transmit may cause devices to interfere with .
Therefore, a router with more antennas is not necessarily a good router, but the number of good router antennas will not be less . The number of antennas must match the maximum transmission rate to be the best . More is just the method promoted by manufacturers .
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